Lock



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Q INVENTOR N. B. HURD LOCK Original Filed March 20, 1929 Patented Aug. 27, 1935 1 LOCK Norman B. Hurd, Newington,

The American Hardware Conn, assignor i6 Corporation, New

Renewed May 11, 1934 i v 23 Claims. (01. 70-91) I g a This invention relates to'pin cylinder locks and F 2 is a viewysimllar 130 bllVShoWing' is of particular benefit in that type of lock in a spe i l r m -k y in pl and h pl which pin cylinder locking mechanism is conwithdrawnfromthe cylinder; tained in the outside door knob.. 1 I, Fig.13 'isiattop plan viewof the plug 'and ad- 5 .One of the main objects of the invention-isto jacent pa wn n Y I 1 provide a simple and improved means for per- Fig; 4. is'ga rear'end view of the knob showing mitting a ready change of the cylinder lock tumthe cylinder l ck in place; l g l bler combination or key combination as it is Fig. 5 is an enlarged sectionalview'taken sub- J sometimes called. stantially in the plane of the line55 of Fig. 1';

101 In public buildings; it is frequently desirable ig- 6 1'8 a d V w p and Sleeve-Q2 1 p 1 to change the locks on various doors. Heretofore, In said drawing, '6 indicates a knob which1op and when such changes have been made, it has erates a .latch or the.like,'fand which is secured usually been necessaryto open the doorand reto a door and unit lock or other 'type'of lock.

move the knobs and much of thelock mecha-- Since-the invention is not'dependent upon the I "nism. In cases wherein the cylinder locks have type of lock or latch operatedneither thedoor '15 been located withinthe knob, the knobs have nor the latch and lock parts carried thereby have" been made in separable parts so that by removing been shown. 1 4 one part access could be had to the cylinder, The .knob 6 in the form shown ishollow, and lock mechanism within. My invention. aims to at the rear 'is'rec'essed to permit of the insertion accomplish this object in anew manner andby from the 'rear when the knob is removed of the 20 novel meanswhich avoids the removal of the cylind r "'lc' r'ry n'g pin ca ing 8, s will be cl a lock body or the-removal ofthe knob or the sepparticularly from Fig. 4. Thefront of the knob aration of any part thereof from anotherpart 6 is providedtwith an aperture'preferably cena; thereof. While I haveshown and will describetl'fillYthEIBOL'l'Il,WhiChiStaIldS theouterend' of :my newcylinder look as supported by a knob,"it the key plug? The cylinder=1 is held in place 25 should beunderstood that the kind of support is within theiknob in'any suitable manner, but in non-essential. 1 1 the'form' shown it is held by means of the knob Briefly stated, in one preferred form. of the shank portion l0 threaded as indicatedat llonto inventionwhich I have shown in the drawing, I a portion of the knob 6. .Meanssuch as set screws provide a pin cylinder lock adapted to be mount |2 ll prevent acciden a unscrewing 0f the 30 ed in a door knob, and I construct a special form shank portion'from the knob. The shank portion of key plug for the cylinder lock which, under is carried zby. the door in the usual or any decertain conditionsjmay be removedfrom the lock. sirable manner; The'plug of the cylinder lock is cylinder and readily withdrawn through the front of special construction .and, comprises an outer $5 of the knob withoutremoving any part of'the section S andxaninn'er sectionZl, both being of 5 knob or cylinder. When said plug has been thus the; same diametergand preferably separable. as withdrawn, different pin tumbler sections may be .later described; The section 9 carries the usual set therein for a different key, .or, by making the tumblers for actuating the locking pins in the outer section of the plug detachable'irom its inpin casing in the usual manner when a proper O ner section, said outer section may be withdrawn keylisxinserted. The entire plug is normally ro- 0 a Britain, Connga corporation of Connecticut Application March 20, 1929, Serial No. 348,519

and detached so'that another section'withra new, combination and new key may be instantly substituted. By my new and improved construction; when the plug has been sufficiently: withdrawn: from the cylinder to permit this change, ;the

locking pins will be retained in operative, posi-;

tion within the cylinder which remains 'in the; knob. awaiting the introduction of a newouter' w plug section.

In the drawing which shows, for illustrative purposes only, one tion- Fig. 1 is a sectional view of a knob and shank carrying'a; cylinder lock and embodying features of the invention and showing apass-key in placfie;

preferred 'form of the inv'en-' bler "5 upon the insertion of a t'atable in theicylinderby means of a key, but is normally 'locked'against longitudinal. with drawal from the front of the knob. This locking of theplug in the cylinder may be accomplished by various mean's,.but,' in the illustrative form ShOWI1,iI employ detent means such as yokes or segments 13*, spring pressed toward the plug and engaging anabutment such asmay be formed by a'groove' IS in the plug section 9. One segment I3 may be moved as by means of a tum-1 5 proper tool such as a special key,l8. Theother segment l4 may be directly engaged and-pressed back bythe back I! of said key, as will be clear'particularly from long enough to engage Normally, in Fig. 1) may be employed for actuating the an ordinary pass-key 20 (as shown gage the segment lS-M remain in the plug against longitudinal permitting rotation thereofjunder the influence special key i8 is key of Fig. l.

- all remain in place in the lock supporting knob 6.

' place formerly occupied by the of the pass-key Z8. Now, when'it is desired to change the combination of the, cylinder lock, the

inserted in place of the passand so as to lift the tumbler IE to the shear line and raise the segment |3 'out of the groovel5. The backside ll. of the key |8, as will be clear from Fig.2, extends'into the groove" I5 so as to directly move the segment l4 out of'the groove I5. Then, after turning the plugslightly by means of the special key, the latter may be drawn outwardly. so as. to withdraw the plug section. 9

fromthe cylinder while; the cylinder, the locking pins, the latch segments, .and associated parts Upon withdrawal of the outenplug section 9, the locking pins'in the cylinderwould drop from their chambers were it not for'the presence of the inner 'plugsection 2| whichnow occupies the outer plugsection 9. .The outer plug section 9 is preferably made detachable from-the inner plug section 2| as by means of an ordinary 22, as shown inFigs; 2 and 3. Thus, when the outer: plug "section has been withdrawn to the outside of the cylinder, it maybe detached from the inner section 2|, leaving the, latter in por sition to retain the. locking 1 cylinder lock.

1%,. der. by any pins in place in the The inner-plug section 2| isapreffrom the cylinthe present erably prevented from removal suitable .means, but, in instance, I provide at tion 2| a groove 24 so that the segments or keys '-|3--|4 will drop into said groove and thus prevent further withdrawalof this section whereby it will continue tostand un the old or a new outer der the locking pins until plug section has been applied and inserted. The

outer side of the groove 24 ispreferably inclined or cammed asindicated at'25 so that when" the pushed in, the'segments |3-'-|4 will ride up the incline 25 and-overthe surface of the remainder of the end of the outer section "9 'until:they drop into the locking groove l5 in the=latterxf When the partsare in the position shown in Fig. 2',the outer. plug section may be "detached from its inner section to plug section with a if the section 9 'is-not tion 2|, a different set ofiplugl'tumblers with an appropriate key therefor may be substituted for those in said outer plug section, slnce'in'said' positionfree" access to all parts of this section may behadas plainly seen; I may thusreadily change thefkey, combination of any look without changing the locking tumblers'in thecasing 8" of the-cylinder and without opening the dooror detaching the knob or any portion thereof, or even withdrawing the 1 withdrawal while still I The special key l8is so bitted as to force thelocking tumblers to the shear line dovetail connection theirmer end of the sec aforesaid latch the section. 2| and then overan. outer part and permit another outer different combination of plug tumblers and key therefor to .be'substituted; or; 1

detachable from the sec-f cylinder therefrom, it being only necessary to withdraw the plug itself with its set of short pin sections.

I have shown in Fig. 6 how a new outer plug section may be provided with a new key 3| and with new tumbler sections adapted thereto, all of said parts being held against separation until ready for use by means of a sleeve 32. The proprietor of apublic building may keep in stock a large number of such plug sections with different key combinations so that he may be prepared at all times to make an immediate change in any of the cylinderlocks in the building. Before application to the door, the sleeve 32 would, of course, be removed, and this same sleeve could then be applied to the. old plug section and key for holding the parts together until it might be appliedto some other similar cylinder lock in the building or elsewhere if desired.

"While I have described the invention in considerable detail and in a preferred form, it is to be understood thatvariouschanges and modifications 1 may bepmade without departing from the spirit or scope of the invention as defined in the following claims.

Iclaim:

1. In alock, 1a knob,a cylinder, locking pins carried insaid'cylinder, a plug in said cylinder comprising an inner and an outer-section, means for locking said plug against longitudinal movemeans being key actuated to release said plug and permit the outer partthereof to be drawn outwardly from said cylinder, and means to permit'the outer part of said plug to be detached from (the inner part thereof to leave said inner part in said cylinder to hold the locking pins in place therein.

3. In a lock, acylinder, locking pins therein, a plug rotatably mounted therein, said plug having. a circumferential groove therein, detent means carried by said cylinder for coaction with said groove for locking said plug against longitudinal displacement from said cylinder, and key actuatable means for mechanically displacing said locking pins and also said detent means to permit said plugto be released and bodily withdrawnfrom" said cylinder.

4. In a look, a lock cylinder having a plurality of locking tumblers therein, a plug comprising an inner part both rotatably mountedin said cylinder andhaving a plurality of tumblers for actuating said locking tumblers, means for normally locking said plug against outward movement in said cylinder, said means being key actuated to release said plug and permit it-to be drawn outwardly relative to said cylinder, the outer part of said plug being removable from the inner part whereby the latter will remain in'said cylinder under the ends of said locking tumblers when the outer part of said plug has been withdrawn.

5. In ailock, a'lock cylinder having a plurality of locking tumblers therein, a? plug comprising anouter part and an inner partboth rotatably :1 plug being movable mounted in-saidcylinder'and having afpluralityiof 1 tumblers for actuating 1 :saidlocking tumblers;v means for normally flocking plug against; outward movement in-saids cylinden said, means 1 being key actuated to release said plug and 'permitr it to be drawn "outwardly, relative to zsaid Jcylinmain in said ,cylinde-runder. the ends ofzsaid locke ing tumblers when, the outer part of said'plug,

. has been withdrawn, said,means, for, normally locking the plug againstendwi se movement also operating to engage and check "the outward-move-= ment of the inner partof .sa'id. plug when the outer part has been drawn butio'f 'saidlcylinderu I a v ce ,Of 1 the; ha ct r;iii ie t d 1 cylinder carryinglocking "pins, a, plug rotatably mounted insaid cylinder, the front'p'art thereof carrying tumblers for rep'ressingsaid pins, said;

outwardly insaid cylinder,"-

means in addition to saidlocking' pins for locking said plug in its normal longitudinal p'osition' in said cylinder andtforlocking said plug in a second position therein with the outer endwI'saidplug outsideofz said; cylinder. 7

'7. In a lock, a cylinder, locking pins therein, a plug therein, a key slot and key operable means in the front portion of said plug to actuate said locking pins and to release said plug to permit it to be drawn outwardly to expose the key operable means in the front portion and to cause the portion thereof when said front portion has been drawn out of said cylinder.

9. In a lock, a cylinder, locking pins therein,

a plug having a key slot therein, key operable means in the front portion of said plug to actuate said locking pins and to release said plug to permit it to be drawn outwardly to expose the key.

operable means in the front portion and to cause the rear portion to move into position to hold the locking pins in place in the cylinder," the front portionof the plug being detachable from the rear portion thereof when said front portion has been drawn out of said cylinder, the detachable means for said plug portions comprising a transverse dovetailed connection.

10. In a lock, a cylinder, a plug mounted in said cylinder for rotation and longitudinal movement, locking pins in said cylinder to prevent any movement of said plug, a key and slot connection be tween said cylinder and plug to normally prevent longitudinal movement of said plug in said cylinder, and means to actuate said parts whereby said plug may be released to be withdrawn from the outer end of said cylinder.

11. In a lock, a cylinder, a key plug rotatable and longitudinally movable therein, locking means in the cylinder for normally locking the plug against movement, a key operable device carried by the plug to release said plug locking means to free the plug for withdrawal from the cylinder, and means to prevent the escape of the plug looking device from the cylinder when the plug has place in the cylinder, the front portion of the plug being detachable from the rear key operable device therein: z12.-In 'a'l'ock,a-'cylinder,-ia key plug rotatable therein, plug "lockingl'i pinsi in said cylinder to mit said plug to: be moved in a plug rotatableitherein g pin tumbler sections' contained partially within the} 'plug an'd partially withinthe cylinder for. locking saidj plug against movement in said: cylinder under !-'one condition and key actua'table to free saidplug whereby it may be moved in said 'cylindergzimeans"for; normally holding said plug against-longitudinal movement in said cylinder when in-one p'osition and actuatable :by a key "to another-I position to free said plug to permit the same to be bodily removed from thecylinden'and means toh'old those pin tumbler sections within: the cylinder in lace therein whn 5 said plug Eis removed:

14. In a pin cylinder look, a body, a plug rotatably mounted therein and having a longitudinal key slot, sectional pins carried partially by said'body and partially by said plug to lock the latter against rotation and free it for rotation, said plug being removable from said body, latch means carried by said body to normally hold said plug against. removal, said pin sections and said plug for removal from said body.

15. In a cylinder look, a body, a plug rotatably mounted therein and having a longitudinal key slot, coacting locking me ns between said bodyand plug for normally locking the latter against rotafrom said body.

16. In a pin cylinder lock,'a body, a plug rtatably mounted therein, said plug having a cir-' cumferential holding shoulder, a spring pressed latch carried bysaid body and normally cooperatdrawn outwardly relatively to said cylinder.

17. In a pincylinder look, a cylinder, a plug rotatable therein and having a l ngitudinal key slot, a shoulder on said plug, means comprising a repressible latch'carried by the cylinder and normally extending into position the rotation and removal of the plug from said beenretractedztherefroin to suificientlyexpose the,

cylinder, said means being operable by the longitudinal movement of a key in the keyway of said plug torelease all of theaforesaid-meanstopen-' mit the plug to be removed. s

19..In a cylinder look, a cylinder body,ia :ro-

tatable plug mounted therein and removable fromthe outer end of said bodygmeans carried by said body to prevent both the rotation and removal of 7 said plug,,and other means carried by said body I to prevent only theremoval of said plug, the first mentioned;means being operable by one keyto' release the plug for rotation only, both means being operable by a different key to release the plug for removal;

v,29. In a'cylinder, et cylinder bodypa rotatablel pluginsertable into and removable from the -outer end or said body, two separate means-- carriedby said body, one .for normally prevent-x ingjrotation of theplug in said body,-theother I 'for normally permitting the rotation of said plug, but preventing ,removal of the same, the first means being operable by one key to permit plug rotation,1both means being operable by a different key to permitgplugremovaL- 21. In a cylinderlock, a cylinder body, a rotatable plug insertableinto and removable from the outer end of said body, two separate means carrotation o'nly','both means being operable by a different key to permit plug removal.

23.In' a pinlcylinder look, a cylinder body, a plug, a lo'o kgng ,pintumbler therefor normally operatingi to prevent both rotation and removal of said plug, latching means normally operating tov prevent only: the removal of said plug, both of said, means being carried vby 'said-body,' said tumbler being operable by one key to permit plug rotation, said tumbler and said latching means being operable by a different key to permit plug withdrawal, u

NORMAN B. HURD. 1 

